Liquid operated double acting device

Details Liquid operated double acting device Liquid operated double acting device

F - Mech Eng,Light,Heat,Weapons

15

B

138/91

F15B 15/14 (2006.01)

Patent

CA 1044570

ABSTRACT OF THE DISCLOSURE The present invention provides a piston for use in a hydraulic ram or other fluid operated device the piston having sealing means intended to prevent the passage of working fluid between the piston and a cylinder in which it moves, said sealing means consisting of an O ring or other sealing device arranged around the circumference of the piston and left and right hand intersecting helical channels formed over a length of the surface of the piston wall between the said sealing device and the end of the piston subject to pressure of the working fluid, the said helical channels acting to retain lubricating fluid and to provide a partial seal against the passage of working fluid between the piston and the cylinder, the sealing effect being completed by the said O ring or other sealing device.

241840

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